| 吕海涛 杨艳妮 严碧歌 朱杰西.余弦形负载超声变幅杆的设计与研究[J].现代生物医学进展英文版,2006,6(1):28-31. |
| 余弦形负载超声变幅杆的设计与研究 |
| The Characteristics of cosine type Loaded ultrasonic horn |
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| DOI： |
| 中文关键词: 超声变幅杆 共振频率 放大系数 |
| 英文关键词: ultrasonic horn resonance frequency magnification coefficient |
| 基金项目:国家自然科学基金资助项目(No: 10074043) 和陕西省自然科学基金资助项目( No: 2003A05) |
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| 中文摘要: |
| 研究余弦形负载超声变幅杆特性。求解了加负载时四种超声变幅杆的输入阻抗, 得到加负载时输入阻抗和Mê bius 变
换参数的统一算式。当变幅杆的输入抗分量为零时, 计算了余弦形负载变幅杆的纵向振动共振频率方程和放大系数。由输入阻
抗的表达式讨论了此类变幅杆的工作稳定性条件和相对阻抗相等点。结果表明由两种方法计算的共振频率方程是相同的; 余弦
形变幅杆的各种参量和方程与负载阻抗紧密相关; 有负载力阻时1/ 4 波长变幅杆的放大系数要比1/ 2 波长变幅杆显著的多, 和
杆两端特性阻抗的几何平均值成正比, 而与负载力组成反比。 |
| 英文摘要: |
| This paper studies a cosine type loaded ultrasonic horn. The unified expressions of amplification factor and mê bius transformation
parameters of four kinds of loaded transformers are given. If the input reactance part of ultrasonic horn is zero, the resonance frequency equation
and magnification coefficient of loaded cosine longitudinal ultrasonic horn will be calculated, including pure resistance and pure reactance and
impedance, Based on the expression of m?b ius transformation, the working stability of this type of transformer and equal point of relative
impedance etc are further discussed. It shows that resonance frequency equation of loaded cosine horn with two above methods are the same; Its
parameters and frequency equation have a close relation with load impedance in relation to zero load horn; In pure resistance condition, magnification
coefficient of one- fourth wavelength transformer is more obvious than that of half- wavelength horn, which varies directly with geometric
mean value of input impedances of both sides, whereas, varies inversely with pure resistance load. |
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